Flash detection doesn't work on IE7
If flash works in IE but the flash detection doesn’t work then you need to uninstall and re-install flash.
I though this was a fluke occurrence but it happened to a guy I work with so it’s probably a bit more prevalent. You can get the a program to uninstall flash here. Then just install it again.
I was using UFO for the flash detection but I doubt that is of any importance.
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If anything is unclear or just plain wrong let us know and should ammend it pretty sharpish. If you visited the page with a particular question leave it and if it's flash related I'll try to answer it.